思路：直接打表
#include<cstdio> #include<vector> #include<cmath> #include<iostream> using namespace std; int num[10010]={0,1356,1967,2577,3188,3799,5156,13154,13762,14374,14985,16341,16953,17563,18174,18785,20142,20753,21364,21975,22587,23942,24554,25165,25775,26387,27744,28355,28966,29576,30187,31544,32155,32767,33375,33987,35344,35954,36566,37176,37787,39144,39754,40365,40976,41587,42946,43554,44166,44777,45387,46746,47356,47967,48578,49188,50545,58543,59154,59766,60374,61731,62342,62952,63564,64175,79559,94944,110328,125713,141098,142455,143067,143675,144287,144898,146254,146866,147476,148087,148698,150055,150666,151277,151888,152500,153855,154467,155078,155688,156300,157657,158268,158879,159489,160100,161457,162068,162680,163288,163900,165257,165867,166479,167089,167700,169057,177054,177665,178276,178887,180246,180854,181466,182077,182687,184046,184656,185267,185878,186488,187845,188456,189067,189679,190287,191644,192255,192865,193477,194087,195443,196054,196664,197275,197886,199243,199855,200463,201075,201686,203042,203654,204264,204875,205486,206843,207454,208065,208676,209288,210643,211255,211866,212476,213088,214445,222444,223055,223665,224276,225633,226244,226856,227464,228076,229433,230043,230655,231265,231876,233233,233843,234454,235065,235676,237035,237643,238255,238866,239476,240835,241445,242056,242667,243277,244634,245245,245856,246468,247076,248433,249044,249654,250266,250876,252232,252843,253453,254064,254675,256032,256644,257252,257864,258475,259831,267829,268439,269050,269661,271018,271629,272240,272851,273463,274818,275430,276041,276651,277263,278620,279231,279842,280452,281063,282420,283031,283643,284251,284863,286220,286830,287442,288052,288663,290020,290630,291241,291852,292463,293822,294430,295042,295653,296263,297622,298232,298843,299454,300064,301421,302032,302643,303255,303863,305220,313218,313828,314440,315050,316406,317017,317627,318238,318849,320206,320818,321426,322038,322649,324005,324617,325227,325838,326449,327806,328417,329028,329639,330251,331606,332218,332829,333439,334051,335408,336019,336630,337240,337851,339208,339819,340431,341039,341651,343008,343618,344230,344840,345451,346808,347418,348029,348640,349251,350610,358606,359218,359829,360439,361798,362408,363019,363630,364240,365597,366208,366819,367431,368039,369396,370007,370617,371229,371839,373195,373806,374416,375027,375638,376995,377607,378215,378827,379438,380794,381406,382016,382627,383238,384595,385206,385817,386428,387040,388395,389007,389618,390228,390840,392197,392808,393419,394029,394640,395997,403995,404607,405215,405827,407184,407794,408406,409016,409627,410984,411594,412205,412816,413427,414786,415394,416006,416617,417227,418586,419196,419807,420418,421028,422385,422996,423607,424219,424827,426184,426795,427405,428017,428627,429983,430594,431204,431815,432426,433783,434395,435003,435615,436226,437582,438194,438804,439415,440026,441383,449381,449992,450603,451215,452570,453182,453793,454403,455015,456372,456983,457594,458204,458815,460172,460783,461395,462003,462615,463972,464582,465194,465804,466415,467772,468382,468993,469604,470215,471574,472182,472794,473405,474015,475374,475984,476595,477206,477816,479173,479784,480395,481007,481615,482972,483583,484193,484805,485415,486771,494768,495378,495989,496600,497957,498569,499177,499789,500400,501756,502368,502978,503589,504200,505557,506168,506779,507390,508002,509357,509969,510580,511190,511802,513159,513770,514381,514991,515602,516959,517570,518182,518790,519402,520759,521369,521981,522591,523202,524559,525169,525780,526391,527002,528361,528969,529581,530192,530802,532161,540158,540769,541380,541990,543347,543958,544569,545181,545789,547146,547757,548367,548979,549589,550945,551556,552166,552777,553388,554745,555357,555965,556577,557188,558544,559156,559766,560377,560988,562345,562956,563567,564178,564790,566145,566757,567368,567978,568590,569947,570558,571169,571779,572390,573747,574358,574970,575578,576190,577547,585544,586156,586766,587377,588734,589344,589955,590566,591177,606562,621946,637331,652716,668100,669459,670069,670680,671291,671901,673258,673869,674480,675092,675700,677057,677668,678278,678890,679500,680856,681467,682077,682688,683299,684656,685268,685876,686488,687099,688455,689067,689677,690288,690899,692256,692867,693478,694089,694701,696056,704055,704666,705276,705888,707245,707856,708467,709077,709688,711045,711656,712268,712876,713488,714845,715455,716067,716677,717288,718645,719255,719866,720477,721088,722447,723055,723667,724278,724888,726247,726857,727468,728079,728689,730046,730657,731268,731880,732488,733845,734456,735066,735678,736289,751673,767058,782442,797827,813212,828596,843981,859365,874750,890135,905519,920904,936289,951673,967058,982442,997827,1013212,1028596,1043981,1059365,1074750,1090135,1105519,1120904,1136289,1151673,1167058,1182442,1197827,1213212,1228596,1243981,1259365,1274750,1290135,1305519,1320904,1336289,1351673,1367058,1382442,1397827,1413212,1428596,1443981,1459365,1474750,1490135,1505519,1506878,1507488,1508099,1508710,1509320,1510677,1518675,1519286,1519898,1520506,1521863,1522474,1523084,1523696,1524306,152566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int OK(int n) { int temp=n,x; int f=0; while(temp){ x=temp%10; if(x==3) f=1; else if(x==1&&f) f=2; else f=0; if(f==2) break; temp/=10; } if(n%13==0&&f==2) return 1; return 0; } int main() { int i,j,n; int ans=0; while(scanf("%d",&n)!=EOF){ ans=0; int cnt=n/200000; ans+=num[cnt]; for(i=cnt*200000+1;i<=n;i++){ if(OK(i)){ ans++; while(i<=n){ i+=13; if(OK(i)) ans++; } if(i>n&&OK(i)) ans--; } } printf("%d ",ans); } return 0; }