Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^~~~~~ main.cpp:2:33: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int m[1001][5],n,k,i,j,I,a;main(){freopen("div3.in","r",stdin);freopen("div3.out","w",stdout);scanf("%d%d",&n,&k);for(i=1;i<=n;i++)scanf("%d",&a),m[1][a%3]++;for(i=2;i<=k;i++)for(j=0;j<3;j++)for(I=0;I<3;I++)m[i][(j+I)%3]=(m[i][(j+I)%3]+m[i-1][j]*m[1][I])%4001;printf("%d",m[k][0]);} ^ main.cpp: In function 'int main()': main.cpp:2:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] int m[1001][5],n,k,i,j,I,a;main(){freopen("div3.in","r",stdin);freopen("div3.out","w",stdout);scanf("%d%d",&n,&k);for(i=1;i<=n;i++)scanf("%d",&a),m[1][a%3]++;for(i=2;i<=k;i++)for(j=0;j<3;j++)for(I=0;I<3;I++)m[i][(j+I)%3]=(m[i][(j+I)%3]+m[i-1][j]*m[1][I])%4001;printf("%d",m[k][0]);} ^ main.cpp:2:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] int m[1001][5],n,k,i,j,I,a;main(){freopen("div3.in","r",stdin);freopen("div3.out","w",stdout);scanf("%d%d",&n,&k);for(i=1;i<=n;i++)scanf("%d",&a),m[1][a%3]++;for(i=2;i<=k;i++)for(j=0;j<3;j++)for(I=0;I<3;I++)m[i][(j+I)%3]=(m[i][(j+I)%3]+m[i-1][j]*m[1][I])%4001;printf("%d",m[k][0]);} ^ main.cpp:2:114: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int m[1001][5],n,k,i,j,I,a;main(){freopen("div3.in","r",stdin);freopen("div3.out","w",stdout);scanf("%d%d",&n,&k);for(i=1;i<=n;i++)scanf("%d",&a),m[1][a%3]++;for(i=2;i<=k;i++)for(j=0;j<3;j++)for(I=0;I<3;I++)m[i][(j+I)%3]=(m[i][(j+I)%3]+m[i-1][j]*m[1][I])%4001;printf("%d",m[k][0]);} ^ main.cpp:2:158: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int m[1001][5],n,k,i,j,I,a;main(){freopen("div3.in","r",stdin);freopen("div3.out","w",stdout);scanf("%d%d",&n,&k);for(i=1;i<=n;i++)scanf("%d",&a),m[1][a%3]++;for(i=2;i<=k;i++)for(j=0;j<3;j++)for(I=0;I<3;I++)m[i][(j+I)%3]=(m[i][(j+I)%3]+m[i-1][j]*m[1][I])%4001;printf("%d",m[k][0]);} ^